2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Voltaire, Inc. All rights reserved.
4 * Copyright (c) 2006 Intel Corporation. All rights reserved.
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
35 #include <linux/module.h>
36 #include <linux/init.h>
37 #include <linux/err.h>
38 #include <linux/random.h>
39 #include <linux/spinlock.h>
40 #include <linux/slab.h>
41 #include <linux/dma-mapping.h>
42 #include <linux/kref.h>
43 #include <linux/idr.h>
44 #include <linux/workqueue.h>
46 #include <rdma/ib_pack.h>
47 #include <rdma/ib_cache.h>
50 MODULE_AUTHOR("Roland Dreier");
51 MODULE_DESCRIPTION("InfiniBand subnet administration query support");
52 MODULE_LICENSE("Dual BSD/GPL");
62 struct ib_mad_agent *agent;
63 struct ib_sa_sm_ah *sm_ah;
64 struct work_struct update_task;
70 int start_port, end_port;
71 struct ib_event_handler event_handler;
72 struct ib_sa_port port[0];
76 void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *);
77 void (*release)(struct ib_sa_query *);
78 struct ib_sa_client *client;
79 struct ib_sa_port *port;
80 struct ib_mad_send_buf *mad_buf;
81 struct ib_sa_sm_ah *sm_ah;
85 struct ib_sa_service_query {
86 void (*callback)(int, struct ib_sa_service_rec *, void *);
88 struct ib_sa_query sa_query;
91 struct ib_sa_path_query {
92 void (*callback)(int, struct ib_sa_path_rec *, void *);
94 struct ib_sa_query sa_query;
97 struct ib_sa_guidinfo_query {
98 void (*callback)(int, struct ib_sa_guidinfo_rec *, void *);
100 struct ib_sa_query sa_query;
103 struct ib_sa_mcmember_query {
104 void (*callback)(int, struct ib_sa_mcmember_rec *, void *);
106 struct ib_sa_query sa_query;
109 static void ib_sa_add_one(struct ib_device *device);
110 static void ib_sa_remove_one(struct ib_device *device);
112 static struct ib_client sa_client = {
114 .add = ib_sa_add_one,
115 .remove = ib_sa_remove_one
118 static DEFINE_SPINLOCK(idr_lock);
119 static DEFINE_IDR(query_idr);
121 static DEFINE_SPINLOCK(tid_lock);
124 #define PATH_REC_FIELD(field) \
125 .struct_offset_bytes = offsetof(struct ib_sa_path_rec, field), \
126 .struct_size_bytes = sizeof ((struct ib_sa_path_rec *) 0)->field, \
127 .field_name = "sa_path_rec:" #field
129 static const struct ib_field path_rec_table[] = {
130 { PATH_REC_FIELD(service_id),
134 { PATH_REC_FIELD(dgid),
138 { PATH_REC_FIELD(sgid),
142 { PATH_REC_FIELD(dlid),
146 { PATH_REC_FIELD(slid),
150 { PATH_REC_FIELD(raw_traffic),
158 { PATH_REC_FIELD(flow_label),
162 { PATH_REC_FIELD(hop_limit),
166 { PATH_REC_FIELD(traffic_class),
170 { PATH_REC_FIELD(reversible),
174 { PATH_REC_FIELD(numb_path),
178 { PATH_REC_FIELD(pkey),
182 { PATH_REC_FIELD(qos_class),
186 { PATH_REC_FIELD(sl),
190 { PATH_REC_FIELD(mtu_selector),
194 { PATH_REC_FIELD(mtu),
198 { PATH_REC_FIELD(rate_selector),
202 { PATH_REC_FIELD(rate),
206 { PATH_REC_FIELD(packet_life_time_selector),
210 { PATH_REC_FIELD(packet_life_time),
214 { PATH_REC_FIELD(preference),
224 #define MCMEMBER_REC_FIELD(field) \
225 .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \
226 .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \
227 .field_name = "sa_mcmember_rec:" #field
229 static const struct ib_field mcmember_rec_table[] = {
230 { MCMEMBER_REC_FIELD(mgid),
234 { MCMEMBER_REC_FIELD(port_gid),
238 { MCMEMBER_REC_FIELD(qkey),
242 { MCMEMBER_REC_FIELD(mlid),
246 { MCMEMBER_REC_FIELD(mtu_selector),
250 { MCMEMBER_REC_FIELD(mtu),
254 { MCMEMBER_REC_FIELD(traffic_class),
258 { MCMEMBER_REC_FIELD(pkey),
262 { MCMEMBER_REC_FIELD(rate_selector),
266 { MCMEMBER_REC_FIELD(rate),
270 { MCMEMBER_REC_FIELD(packet_life_time_selector),
274 { MCMEMBER_REC_FIELD(packet_life_time),
278 { MCMEMBER_REC_FIELD(sl),
282 { MCMEMBER_REC_FIELD(flow_label),
286 { MCMEMBER_REC_FIELD(hop_limit),
290 { MCMEMBER_REC_FIELD(scope),
294 { MCMEMBER_REC_FIELD(join_state),
298 { MCMEMBER_REC_FIELD(proxy_join),
308 #define SERVICE_REC_FIELD(field) \
309 .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \
310 .struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \
311 .field_name = "sa_service_rec:" #field
313 static const struct ib_field service_rec_table[] = {
314 { SERVICE_REC_FIELD(id),
318 { SERVICE_REC_FIELD(gid),
322 { SERVICE_REC_FIELD(pkey),
326 { SERVICE_REC_FIELD(lease),
330 { SERVICE_REC_FIELD(key),
334 { SERVICE_REC_FIELD(name),
338 { SERVICE_REC_FIELD(data8),
342 { SERVICE_REC_FIELD(data16),
346 { SERVICE_REC_FIELD(data32),
350 { SERVICE_REC_FIELD(data64),
356 #define GUIDINFO_REC_FIELD(field) \
357 .struct_offset_bytes = offsetof(struct ib_sa_guidinfo_rec, field), \
358 .struct_size_bytes = sizeof((struct ib_sa_guidinfo_rec *) 0)->field, \
359 .field_name = "sa_guidinfo_rec:" #field
361 static const struct ib_field guidinfo_rec_table[] = {
362 { GUIDINFO_REC_FIELD(lid),
366 { GUIDINFO_REC_FIELD(block_num),
370 { GUIDINFO_REC_FIELD(res1),
374 { GUIDINFO_REC_FIELD(res2),
378 { GUIDINFO_REC_FIELD(guid_info_list),
384 static void free_sm_ah(struct kref *kref)
386 struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
388 ib_destroy_ah(sm_ah->ah);
392 static void update_sm_ah(struct work_struct *work)
394 struct ib_sa_port *port =
395 container_of(work, struct ib_sa_port, update_task);
396 struct ib_sa_sm_ah *new_ah;
397 struct ib_port_attr port_attr;
398 struct ib_ah_attr ah_attr;
400 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
401 printk(KERN_WARNING "Couldn't query port\n");
405 new_ah = kmalloc(sizeof *new_ah, GFP_KERNEL);
407 printk(KERN_WARNING "Couldn't allocate new SM AH\n");
411 kref_init(&new_ah->ref);
412 new_ah->src_path_mask = (1 << port_attr.lmc) - 1;
414 new_ah->pkey_index = 0;
415 if (ib_find_pkey(port->agent->device, port->port_num,
416 IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index))
417 printk(KERN_ERR "Couldn't find index for default PKey\n");
419 memset(&ah_attr, 0, sizeof ah_attr);
420 ah_attr.dlid = port_attr.sm_lid;
421 ah_attr.sl = port_attr.sm_sl;
422 ah_attr.port_num = port->port_num;
424 new_ah->ah = ib_create_ah(port->agent->qp->pd, &ah_attr);
425 if (IS_ERR(new_ah->ah)) {
426 printk(KERN_WARNING "Couldn't create new SM AH\n");
431 spin_lock_irq(&port->ah_lock);
433 kref_put(&port->sm_ah->ref, free_sm_ah);
434 port->sm_ah = new_ah;
435 spin_unlock_irq(&port->ah_lock);
439 static void ib_sa_event(struct ib_event_handler *handler, struct ib_event *event)
441 if (event->event == IB_EVENT_PORT_ERR ||
442 event->event == IB_EVENT_PORT_ACTIVE ||
443 event->event == IB_EVENT_LID_CHANGE ||
444 event->event == IB_EVENT_PKEY_CHANGE ||
445 event->event == IB_EVENT_SM_CHANGE ||
446 event->event == IB_EVENT_CLIENT_REREGISTER) {
448 struct ib_sa_device *sa_dev =
449 container_of(handler, typeof(*sa_dev), event_handler);
450 struct ib_sa_port *port =
451 &sa_dev->port[event->element.port_num - sa_dev->start_port];
453 if (rdma_port_get_link_layer(handler->device, port->port_num) != IB_LINK_LAYER_INFINIBAND)
456 spin_lock_irqsave(&port->ah_lock, flags);
458 kref_put(&port->sm_ah->ref, free_sm_ah);
460 spin_unlock_irqrestore(&port->ah_lock, flags);
462 queue_work(ib_wq, &sa_dev->port[event->element.port_num -
463 sa_dev->start_port].update_task);
467 void ib_sa_register_client(struct ib_sa_client *client)
469 atomic_set(&client->users, 1);
470 init_completion(&client->comp);
472 EXPORT_SYMBOL(ib_sa_register_client);
474 void ib_sa_unregister_client(struct ib_sa_client *client)
476 ib_sa_client_put(client);
477 wait_for_completion(&client->comp);
479 EXPORT_SYMBOL(ib_sa_unregister_client);
482 * ib_sa_cancel_query - try to cancel an SA query
483 * @id:ID of query to cancel
484 * @query:query pointer to cancel
486 * Try to cancel an SA query. If the id and query don't match up or
487 * the query has already completed, nothing is done. Otherwise the
488 * query is canceled and will complete with a status of -EINTR.
490 void ib_sa_cancel_query(int id, struct ib_sa_query *query)
493 struct ib_mad_agent *agent;
494 struct ib_mad_send_buf *mad_buf;
496 spin_lock_irqsave(&idr_lock, flags);
497 if (idr_find(&query_idr, id) != query) {
498 spin_unlock_irqrestore(&idr_lock, flags);
501 agent = query->port->agent;
502 mad_buf = query->mad_buf;
503 spin_unlock_irqrestore(&idr_lock, flags);
505 ib_cancel_mad(agent, mad_buf);
507 EXPORT_SYMBOL(ib_sa_cancel_query);
509 static u8 get_src_path_mask(struct ib_device *device, u8 port_num)
511 struct ib_sa_device *sa_dev;
512 struct ib_sa_port *port;
516 sa_dev = ib_get_client_data(device, &sa_client);
520 port = &sa_dev->port[port_num - sa_dev->start_port];
521 spin_lock_irqsave(&port->ah_lock, flags);
522 src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f;
523 spin_unlock_irqrestore(&port->ah_lock, flags);
525 return src_path_mask;
528 int ib_init_ah_from_path(struct ib_device *device, u8 port_num,
529 struct ib_sa_path_rec *rec, struct ib_ah_attr *ah_attr)
535 memset(ah_attr, 0, sizeof *ah_attr);
536 ah_attr->dlid = be16_to_cpu(rec->dlid);
537 ah_attr->sl = rec->sl;
538 ah_attr->src_path_bits = be16_to_cpu(rec->slid) &
539 get_src_path_mask(device, port_num);
540 ah_attr->port_num = port_num;
541 ah_attr->static_rate = rec->rate;
543 force_grh = rdma_port_get_link_layer(device, port_num) == IB_LINK_LAYER_ETHERNET;
545 if (rec->hop_limit > 1 || force_grh) {
546 ah_attr->ah_flags = IB_AH_GRH;
547 ah_attr->grh.dgid = rec->dgid;
549 ret = ib_find_cached_gid(device, &rec->sgid, &port_num,
554 ah_attr->grh.sgid_index = gid_index;
555 ah_attr->grh.flow_label = be32_to_cpu(rec->flow_label);
556 ah_attr->grh.hop_limit = rec->hop_limit;
557 ah_attr->grh.traffic_class = rec->traffic_class;
561 EXPORT_SYMBOL(ib_init_ah_from_path);
563 static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask)
567 spin_lock_irqsave(&query->port->ah_lock, flags);
568 if (!query->port->sm_ah) {
569 spin_unlock_irqrestore(&query->port->ah_lock, flags);
572 kref_get(&query->port->sm_ah->ref);
573 query->sm_ah = query->port->sm_ah;
574 spin_unlock_irqrestore(&query->port->ah_lock, flags);
576 query->mad_buf = ib_create_send_mad(query->port->agent, 1,
577 query->sm_ah->pkey_index,
578 0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA,
580 if (IS_ERR(query->mad_buf)) {
581 kref_put(&query->sm_ah->ref, free_sm_ah);
585 query->mad_buf->ah = query->sm_ah->ah;
590 static void free_mad(struct ib_sa_query *query)
592 ib_free_send_mad(query->mad_buf);
593 kref_put(&query->sm_ah->ref, free_sm_ah);
596 static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent)
600 memset(mad, 0, sizeof *mad);
602 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
603 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
604 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
606 spin_lock_irqsave(&tid_lock, flags);
608 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
609 spin_unlock_irqrestore(&tid_lock, flags);
612 static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
618 if (!idr_pre_get(&query_idr, gfp_mask))
620 spin_lock_irqsave(&idr_lock, flags);
621 ret = idr_get_new(&query_idr, query, &id);
622 spin_unlock_irqrestore(&idr_lock, flags);
628 query->mad_buf->timeout_ms = timeout_ms;
629 query->mad_buf->context[0] = query;
632 ret = ib_post_send_mad(query->mad_buf, NULL);
634 spin_lock_irqsave(&idr_lock, flags);
635 idr_remove(&query_idr, id);
636 spin_unlock_irqrestore(&idr_lock, flags);
640 * It's not safe to dereference query any more, because the
641 * send may already have completed and freed the query in
644 return ret ? ret : id;
647 void ib_sa_unpack_path(void *attribute, struct ib_sa_path_rec *rec)
649 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec);
651 EXPORT_SYMBOL(ib_sa_unpack_path);
653 static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
655 struct ib_sa_mad *mad)
657 struct ib_sa_path_query *query =
658 container_of(sa_query, struct ib_sa_path_query, sa_query);
661 struct ib_sa_path_rec rec;
663 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table),
665 query->callback(status, &rec, query->context);
667 query->callback(status, NULL, query->context);
670 static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
672 kfree(container_of(sa_query, struct ib_sa_path_query, sa_query));
676 * ib_sa_path_rec_get - Start a Path get query
678 * @device:device to send query on
679 * @port_num: port number to send query on
680 * @rec:Path Record to send in query
681 * @comp_mask:component mask to send in query
682 * @timeout_ms:time to wait for response
683 * @gfp_mask:GFP mask to use for internal allocations
684 * @callback:function called when query completes, times out or is
686 * @context:opaque user context passed to callback
687 * @sa_query:query context, used to cancel query
689 * Send a Path Record Get query to the SA to look up a path. The
690 * callback function will be called when the query completes (or
691 * fails); status is 0 for a successful response, -EINTR if the query
692 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
693 * occurred sending the query. The resp parameter of the callback is
694 * only valid if status is 0.
696 * If the return value of ib_sa_path_rec_get() is negative, it is an
697 * error code. Otherwise it is a query ID that can be used to cancel
700 int ib_sa_path_rec_get(struct ib_sa_client *client,
701 struct ib_device *device, u8 port_num,
702 struct ib_sa_path_rec *rec,
703 ib_sa_comp_mask comp_mask,
704 int timeout_ms, gfp_t gfp_mask,
705 void (*callback)(int status,
706 struct ib_sa_path_rec *resp,
709 struct ib_sa_query **sa_query)
711 struct ib_sa_path_query *query;
712 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
713 struct ib_sa_port *port;
714 struct ib_mad_agent *agent;
715 struct ib_sa_mad *mad;
721 port = &sa_dev->port[port_num - sa_dev->start_port];
724 query = kmalloc(sizeof *query, gfp_mask);
728 query->sa_query.port = port;
729 ret = alloc_mad(&query->sa_query, gfp_mask);
733 ib_sa_client_get(client);
734 query->sa_query.client = client;
735 query->callback = callback;
736 query->context = context;
738 mad = query->sa_query.mad_buf->mad;
739 init_mad(mad, agent);
741 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
742 query->sa_query.release = ib_sa_path_rec_release;
743 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
744 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
745 mad->sa_hdr.comp_mask = comp_mask;
747 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, mad->data);
749 *sa_query = &query->sa_query;
751 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
759 ib_sa_client_put(query->sa_query.client);
760 free_mad(&query->sa_query);
766 EXPORT_SYMBOL(ib_sa_path_rec_get);
768 static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
770 struct ib_sa_mad *mad)
772 struct ib_sa_service_query *query =
773 container_of(sa_query, struct ib_sa_service_query, sa_query);
776 struct ib_sa_service_rec rec;
778 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
780 query->callback(status, &rec, query->context);
782 query->callback(status, NULL, query->context);
785 static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
787 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
791 * ib_sa_service_rec_query - Start Service Record operation
793 * @device:device to send request on
794 * @port_num: port number to send request on
795 * @method:SA method - should be get, set, or delete
796 * @rec:Service Record to send in request
797 * @comp_mask:component mask to send in request
798 * @timeout_ms:time to wait for response
799 * @gfp_mask:GFP mask to use for internal allocations
800 * @callback:function called when request completes, times out or is
802 * @context:opaque user context passed to callback
803 * @sa_query:request context, used to cancel request
805 * Send a Service Record set/get/delete to the SA to register,
806 * unregister or query a service record.
807 * The callback function will be called when the request completes (or
808 * fails); status is 0 for a successful response, -EINTR if the query
809 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
810 * occurred sending the query. The resp parameter of the callback is
811 * only valid if status is 0.
813 * If the return value of ib_sa_service_rec_query() is negative, it is an
814 * error code. Otherwise it is a request ID that can be used to cancel
817 int ib_sa_service_rec_query(struct ib_sa_client *client,
818 struct ib_device *device, u8 port_num, u8 method,
819 struct ib_sa_service_rec *rec,
820 ib_sa_comp_mask comp_mask,
821 int timeout_ms, gfp_t gfp_mask,
822 void (*callback)(int status,
823 struct ib_sa_service_rec *resp,
826 struct ib_sa_query **sa_query)
828 struct ib_sa_service_query *query;
829 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
830 struct ib_sa_port *port;
831 struct ib_mad_agent *agent;
832 struct ib_sa_mad *mad;
838 port = &sa_dev->port[port_num - sa_dev->start_port];
841 if (method != IB_MGMT_METHOD_GET &&
842 method != IB_MGMT_METHOD_SET &&
843 method != IB_SA_METHOD_DELETE)
846 query = kmalloc(sizeof *query, gfp_mask);
850 query->sa_query.port = port;
851 ret = alloc_mad(&query->sa_query, gfp_mask);
855 ib_sa_client_get(client);
856 query->sa_query.client = client;
857 query->callback = callback;
858 query->context = context;
860 mad = query->sa_query.mad_buf->mad;
861 init_mad(mad, agent);
863 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
864 query->sa_query.release = ib_sa_service_rec_release;
865 mad->mad_hdr.method = method;
866 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
867 mad->sa_hdr.comp_mask = comp_mask;
869 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
872 *sa_query = &query->sa_query;
874 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
882 ib_sa_client_put(query->sa_query.client);
883 free_mad(&query->sa_query);
889 EXPORT_SYMBOL(ib_sa_service_rec_query);
891 static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
893 struct ib_sa_mad *mad)
895 struct ib_sa_mcmember_query *query =
896 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
899 struct ib_sa_mcmember_rec rec;
901 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
903 query->callback(status, &rec, query->context);
905 query->callback(status, NULL, query->context);
908 static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
910 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
913 int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
914 struct ib_device *device, u8 port_num,
916 struct ib_sa_mcmember_rec *rec,
917 ib_sa_comp_mask comp_mask,
918 int timeout_ms, gfp_t gfp_mask,
919 void (*callback)(int status,
920 struct ib_sa_mcmember_rec *resp,
923 struct ib_sa_query **sa_query)
925 struct ib_sa_mcmember_query *query;
926 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
927 struct ib_sa_port *port;
928 struct ib_mad_agent *agent;
929 struct ib_sa_mad *mad;
935 port = &sa_dev->port[port_num - sa_dev->start_port];
938 query = kmalloc(sizeof *query, gfp_mask);
942 query->sa_query.port = port;
943 ret = alloc_mad(&query->sa_query, gfp_mask);
947 ib_sa_client_get(client);
948 query->sa_query.client = client;
949 query->callback = callback;
950 query->context = context;
952 mad = query->sa_query.mad_buf->mad;
953 init_mad(mad, agent);
955 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
956 query->sa_query.release = ib_sa_mcmember_rec_release;
957 mad->mad_hdr.method = method;
958 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
959 mad->sa_hdr.comp_mask = comp_mask;
961 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
964 *sa_query = &query->sa_query;
966 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
974 ib_sa_client_put(query->sa_query.client);
975 free_mad(&query->sa_query);
982 /* Support GuidInfoRecord */
983 static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query,
985 struct ib_sa_mad *mad)
987 struct ib_sa_guidinfo_query *query =
988 container_of(sa_query, struct ib_sa_guidinfo_query, sa_query);
991 struct ib_sa_guidinfo_rec rec;
993 ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table),
995 query->callback(status, &rec, query->context);
997 query->callback(status, NULL, query->context);
1000 static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query)
1002 kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query));
1005 int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
1006 struct ib_device *device, u8 port_num,
1007 struct ib_sa_guidinfo_rec *rec,
1008 ib_sa_comp_mask comp_mask, u8 method,
1009 int timeout_ms, gfp_t gfp_mask,
1010 void (*callback)(int status,
1011 struct ib_sa_guidinfo_rec *resp,
1014 struct ib_sa_query **sa_query)
1016 struct ib_sa_guidinfo_query *query;
1017 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1018 struct ib_sa_port *port;
1019 struct ib_mad_agent *agent;
1020 struct ib_sa_mad *mad;
1026 if (method != IB_MGMT_METHOD_GET &&
1027 method != IB_MGMT_METHOD_SET &&
1028 method != IB_SA_METHOD_DELETE) {
1032 port = &sa_dev->port[port_num - sa_dev->start_port];
1033 agent = port->agent;
1035 query = kmalloc(sizeof *query, gfp_mask);
1039 query->sa_query.port = port;
1040 ret = alloc_mad(&query->sa_query, gfp_mask);
1044 ib_sa_client_get(client);
1045 query->sa_query.client = client;
1046 query->callback = callback;
1047 query->context = context;
1049 mad = query->sa_query.mad_buf->mad;
1050 init_mad(mad, agent);
1052 query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL;
1053 query->sa_query.release = ib_sa_guidinfo_rec_release;
1055 mad->mad_hdr.method = method;
1056 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC);
1057 mad->sa_hdr.comp_mask = comp_mask;
1059 ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec,
1062 *sa_query = &query->sa_query;
1064 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1072 ib_sa_client_put(query->sa_query.client);
1073 free_mad(&query->sa_query);
1079 EXPORT_SYMBOL(ib_sa_guid_info_rec_query);
1081 static void send_handler(struct ib_mad_agent *agent,
1082 struct ib_mad_send_wc *mad_send_wc)
1084 struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
1085 unsigned long flags;
1087 if (query->callback)
1088 switch (mad_send_wc->status) {
1090 /* No callback -- already got recv */
1092 case IB_WC_RESP_TIMEOUT_ERR:
1093 query->callback(query, -ETIMEDOUT, NULL);
1095 case IB_WC_WR_FLUSH_ERR:
1096 query->callback(query, -EINTR, NULL);
1099 query->callback(query, -EIO, NULL);
1103 spin_lock_irqsave(&idr_lock, flags);
1104 idr_remove(&query_idr, query->id);
1105 spin_unlock_irqrestore(&idr_lock, flags);
1108 ib_sa_client_put(query->client);
1109 query->release(query);
1112 static void recv_handler(struct ib_mad_agent *mad_agent,
1113 struct ib_mad_recv_wc *mad_recv_wc)
1115 struct ib_sa_query *query;
1116 struct ib_mad_send_buf *mad_buf;
1118 mad_buf = (void *) (unsigned long) mad_recv_wc->wc->wr_id;
1119 query = mad_buf->context[0];
1121 if (query->callback) {
1122 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
1123 query->callback(query,
1124 mad_recv_wc->recv_buf.mad->mad_hdr.status ?
1126 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
1128 query->callback(query, -EIO, NULL);
1131 ib_free_recv_mad(mad_recv_wc);
1134 static void ib_sa_add_one(struct ib_device *device)
1136 struct ib_sa_device *sa_dev;
1139 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
1142 if (device->node_type == RDMA_NODE_IB_SWITCH)
1146 e = device->phys_port_cnt;
1149 sa_dev = kzalloc(sizeof *sa_dev +
1150 (e - s + 1) * sizeof (struct ib_sa_port),
1155 sa_dev->start_port = s;
1156 sa_dev->end_port = e;
1158 for (i = 0; i <= e - s; ++i) {
1159 spin_lock_init(&sa_dev->port[i].ah_lock);
1160 if (rdma_port_get_link_layer(device, i + 1) != IB_LINK_LAYER_INFINIBAND)
1163 sa_dev->port[i].sm_ah = NULL;
1164 sa_dev->port[i].port_num = i + s;
1166 sa_dev->port[i].agent =
1167 ib_register_mad_agent(device, i + s, IB_QPT_GSI,
1168 NULL, 0, send_handler,
1169 recv_handler, sa_dev);
1170 if (IS_ERR(sa_dev->port[i].agent))
1173 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
1176 ib_set_client_data(device, &sa_client, sa_dev);
1179 * We register our event handler after everything is set up,
1180 * and then update our cached info after the event handler is
1181 * registered to avoid any problems if a port changes state
1182 * during our initialization.
1185 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
1186 if (ib_register_event_handler(&sa_dev->event_handler))
1189 for (i = 0; i <= e - s; ++i)
1190 if (rdma_port_get_link_layer(device, i + 1) == IB_LINK_LAYER_INFINIBAND)
1191 update_sm_ah(&sa_dev->port[i].update_task);
1197 if (rdma_port_get_link_layer(device, i + 1) == IB_LINK_LAYER_INFINIBAND)
1198 ib_unregister_mad_agent(sa_dev->port[i].agent);
1205 static void ib_sa_remove_one(struct ib_device *device)
1207 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1213 ib_unregister_event_handler(&sa_dev->event_handler);
1215 flush_workqueue(ib_wq);
1217 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
1218 if (rdma_port_get_link_layer(device, i + 1) == IB_LINK_LAYER_INFINIBAND) {
1219 ib_unregister_mad_agent(sa_dev->port[i].agent);
1220 if (sa_dev->port[i].sm_ah)
1221 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
1229 static int __init ib_sa_init(void)
1233 get_random_bytes(&tid, sizeof tid);
1235 ret = ib_register_client(&sa_client);
1237 printk(KERN_ERR "Couldn't register ib_sa client\n");
1243 printk(KERN_ERR "Couldn't initialize multicast handling\n");
1249 ib_unregister_client(&sa_client);
1254 static void __exit ib_sa_cleanup(void)
1257 ib_unregister_client(&sa_client);
1258 idr_destroy(&query_idr);
1261 module_init(ib_sa_init);
1262 module_exit(ib_sa_cleanup);